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Clean Air Challenge 2016

Clean Air Challenge Leave your car at home

July 1 - August 31

Leave Your Car Home & Win!

Leave your car at home one or more days a week during the high ozone months of July and August, and you could win:

  • Grand Prize: iPad Air 2
  • Runner-up Prizes: $100 REI gift cards
  • Prizes just for participating

Reduce ground-level ozone and greenhouse gas emissions.


Registration works best using Chrome, Firefox, or Internet Explorer 10/11 or higher.
Email or call 303-441-1147 if you have questions.

2015 Results & Winners


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Air Quality Program

Main: 303-441-1564
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